African Milk Barrel
Euphorbia horrida · Native to South Africa (Western and Eastern Cape)
A dramatic, barrel-shaped Euphorbia from South Africa that closely resembles a cactus but belongs to an entirely different plant family — bold, architectural, and nearly indestructible.
Available in 4½ inch
Care
Light
Full, direct sun. An outdoor patio in warm months or a south-facing window is ideal.
Water
Water sparingly and allow to dry completely between waterings. Very little in winter.
Soil & Feeding
Fast-draining cactus and succulent mix. No heavy feeding needed.
Quick Tip
Wear gloves when handling — the white latex sap is toxic and irritating to skin and eyes.
Details
Euphorbia horrida is a dramatic succulent from the dry regions of South Africa, forming ribbed barrels that look remarkably like true barrel cacti — a striking example of convergent evolution.
- ✅ Bold, barrel-shaped form with prominent ribs
- ✅ Extremely drought-tolerant and low-maintenance
- ✅ Architectural statement plant for sunny spots
Size
Available in a 4½ inch pot — a great starter size that’s easy to place on a windowsill, desk, or shelf, and simple to repot as it grows.
Good to Know
⚠️ Produces toxic white latex sap that irritates skin and eyes — wear gloves when handling and avoid contact with sap. Keep away from children and pets.
Plant Bio
Euphorbia horrida · also called the African Milk Cactus
Native to the dry, rocky coastal areas of South Africa’s Cape provinces, Euphorbia horrida is a succulent that has evolved a form remarkably convergent with true barrel cacti — a fascinating example of parallel evolution on different continents.
Despite looking like a cactus, it is a Euphorbia — a member of an enormous, diverse plant family that also includes poinsettias and rubber trees. Its “spines” are actually modified, hardened flower stalks rather than true cactus spines.
It produces small, inconspicuous yellow-green flowers and is grown primarily for its dramatic, sculptural form, which becomes more impressive with each year of growth.
What makes it special?
- Not a true cactus — a Euphorbia that independently evolved a remarkably similar barrel form.
- The “spines” are hardened flower stalks — a unique botanical feature.
- Produces caustic white latex sap — a key distinction from all true cacti.
Note: Produces toxic white latex sap — wear gloves when handling and avoid contact with sap. Keep away from children and pets. Grown for ornamental purposes only.